yes mzilikazi is right, there might be a DMA error in there, wont hurt much by adding that, just reduced speed reading/writing to devices able to use dma.
suming up I think that one of the below should work.
Code:
knoppix atapicd noscsi nodma
OR
Code:
knoppix26 atapicd noscsi nodma
should work for you. if not let us know.
and worstcase a nomount on the end.